68 Field Museum of Natural History — Zoology, Vol. X. 
Deuterodon atracaudata sp. nov. 
Type No. 7573, F. M. N. H.; length 114 mm.; Rio Frijoles, C. Z., 
Panama. 
Head 4; depth 3; D. 8; A. 27; scales 36. 
Body rather elongate, much compressed, ventral region rounded; 
mouth small, the lower jaw scarcely included; maxillary reaching 
slightly past anterior margin of orbit, 2^3 in head; eye small, 2-f in 
head; snout 3^ in head; dorsal over anterior part of anal, its origin 
nearer base of caudal than head; base of anal 3X in body. 
Color olivaceous, silvery, a faint silvery band; a humeral spot; 
black caudal spot extending on outer rays of caudal fin; other fins 
plain. 
Creagrutus notropoides sp. nov. 
Type No. 7574, F. M. N. H.; length 143 mm.; Rio Indio, Panama. 
Head 4; depth 4; D. 9; A. 14; scales 35. 
Body robust, little compressed, in general form and appearance 
much like Noiropus blennius; snout blunt; mouth small, the lower jaw 
included; eye rather large, 2}4 in head; snout 3^; dorsal fin over ventrals, 
its origin nearer tip of snout than base of caudal; pectorals 4^3 in 
body, their tips reaching base of ventrals; tips of ventrals reaching 
anal; lateral line not quite complete. 
Color olivaceous, sides with a narrow silvery band; a black humeral 
spot; no caudal spot; fins all plain. 
Taken in swift water in the upper Chagres and tributaries. 
Eleotris latifasciatus sp. nov. 
Type No. 7575, F. M. N. H.; length 160 mm.; Rio Cardenas, 
Panama. 
Head 3^; depth 3J; D. V, 9; A. 10; scales 37. 
Body robust, not much compressed; profile evenly convex; top of 
head flat; interorbital 3 in head; mouth small, maxillary scarcely reach¬ 
ing past anterior margin of orbit; teeth in bands, none canine-like; eye 
in head; snout 4^; cheeks and opercles scaly; dorsal spines flexible, 
longest about f length of head; ventrals separate, their tips nearly to 
origin of anal; pectorals broad, of 13 rays, about 4 scales between 
dorsals; caudal rounded, its length equals length of head. 
Color dark olivaceous, sides with a black lateral band; its width 
about equals diameter of eye; a light band of nearly same width above 
this; base of caudal rays with an oblong black blotch; fins nearly plain. 
A few specimens taken in fresh water streams on the Pacific slope of 
the Isthmus near Panama City. 
THE LIBRARY rr 
FEB 17 
OWWRS 
